Luis Von Ahn

Yeah, I really don't like that, but we have not been able to come up with a better way, despite the fact that we have tried a lot

of like you know kind of doing things in the app where we're like oh okay we can do kind of micro measurements of whether you've learned a little bit sword etc it's been super complicated to do that and never given great results so we just rely on these old school give you a test and then it's a pre-test post-test method that's it that's it

of like you know kind of doing things in the app where we're like oh okay we can do kind of micro measurements of whether you've learned a little bit sword etc it's been super complicated to do that and never given great results so we just rely on these old school give you a test and then it's a pre-test post-test method that's it that's it

of like you know kind of doing things in the app where we're like oh okay we can do kind of micro measurements of whether you've learned a little bit sword etc it's been super complicated to do that and never given great results so we just rely on these old school give you a test and then it's a pre-test post-test method that's it that's it

We are using their measurements, and efficacy is really important. We spend a lot of effort trying to make sure that we're efficacious. And, you know, the other good news, even though we do this only –

We are using their measurements, and efficacy is really important. We spend a lot of effort trying to make sure that we're efficacious. And, you know, the other good news, even though we do this only –

We are using their measurements, and efficacy is really important. We spend a lot of effort trying to make sure that we're efficacious. And, you know, the other good news, even though we do this only –

know the time scale here is years you can plot how effective duolingo is and if you look at it over the last 10 years duolingo is clearly more every year it is more effective than the previous year for sure on this test space yeah yeah basically more people are passing the test more people are getting higher scores in the test i mean basically people are learning more on duolingo every year.

know the time scale here is years you can plot how effective duolingo is and if you look at it over the last 10 years duolingo is clearly more every year it is more effective than the previous year for sure on this test space yeah yeah basically more people are passing the test more people are getting higher scores in the test i mean basically people are learning more on duolingo every year.

know the time scale here is years you can plot how effective duolingo is and if you look at it over the last 10 years duolingo is clearly more every year it is more effective than the previous year for sure on this test space yeah yeah basically more people are passing the test more people are getting higher scores in the test i mean basically people are learning more on duolingo every year.

And there's a number of reasons for that. I mean, because we work a lot to try to teach you better, but it is definitely true. And at this point, you know, when we compare ourselves, we know we are as good or better than a classroom. We know we're not yet as good as a one on one human tutor, a good one on one human tutor. We know we're not yet as good at that.

And there's a number of reasons for that. I mean, because we work a lot to try to teach you better, but it is definitely true. And at this point, you know, when we compare ourselves, we know we are as good or better than a classroom. We know we're not yet as good as a one on one human tutor, a good one on one human tutor. We know we're not yet as good at that.

And there's a number of reasons for that. I mean, because we work a lot to try to teach you better, but it is definitely true. And at this point, you know, when we compare ourselves, we know we are as good or better than a classroom. We know we're not yet as good as a one on one human tutor, a good one on one human tutor. We know we're not yet as good at that.

And but our goal and I think we can do that over the next three or five years, I think we'll be as good as a one on one human tutor in terms of efficacy. We're way better in terms of getting you to stick around. Getting to stick around, we're just way better at that. But efficacy, it just turned out, if you have the money and the strength to continue going, a one-on-one human tutor does better.

And but our goal and I think we can do that over the next three or five years, I think we'll be as good as a one on one human tutor in terms of efficacy. We're way better in terms of getting you to stick around. Getting to stick around, we're just way better at that. But efficacy, it just turned out, if you have the money and the strength to continue going, a one-on-one human tutor does better.

And but our goal and I think we can do that over the next three or five years, I think we'll be as good as a one on one human tutor in terms of efficacy. We're way better in terms of getting you to stick around. Getting to stick around, we're just way better at that. But efficacy, it just turned out, if you have the money and the strength to continue going, a one-on-one human tutor does better.

Yes, there is.

Yes, there is.

Yes, there is.

Very easily. Always go with engagement.